Fuel injectors, checking for leaks, injection quantity and spray pattern: Conditions

• Fuel pressure OK.

• Remove intake manifold.→ Intake manifold, assembly overview 

Fig 1: Disconnecting Electrical Connectors For Fuel Injectors By Pressing Retaining Tab

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Separate electrical connections at fuel injectors by pressing release tabs down and then inward - arrow  -.

NOTE:

• When the connection is released, the release tab remains in the lower position. When reconnecting the connector, the release tab engages upward again.

• Disconnect fuel supply line - 1  - and fuel return line - 2  - from fuel rail. Use a clean rag to catch exiting fuel.

Fig 2: Fuel Supply Line & Fuel Return Line

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE:

• Vehicles with engine code BSB are without the fuel return line - 2  - in the illustration.

• Disconnect vacuum hose from fuel pressure regulator.
• Remove bolts from fuel rail - arrows  - (tightening torque: 10 Nm).
• Pull fuel rail (on transmission side) with injectors upward uniformly from intake manifold and set aside in engine compartment on a clean cloth.
• Reconnect fuel supply line - 1  - and fuel return line - 2  - to fuel rail.

NOTE:

• Vehicles with engine code BSB are without the fuel return line - 2  - in the illustration.